Punching-machine.



H. B. KRAUT.

PUNGHING MACHINE.

APPLICATION FILED 111:0. a0, 1910.

Patented Aug. 6, 1912.

a BHEBTSBHIIET 1.

' H. B. KRAUT. PUNOHING MACHINE.

APPLICATION FILED DBO. 30, 1910.

Patented Aug. 6, 1912.

3 SHEETBBHEET 2.

' INVENTOH flrmfifiazaf a? J4 J 6 wrmsssssj? H. B. KRAUT. PUNOHINGMACHINE. APPLICATION FILED DBO. 30, 1910.

Patented Aug. 6, 1912.

w WINVENTOR flzbzafijfizzzzf W) g w vy v UNITED STATES PATENT omj flHANS B. KRAFT, OF CH-I CAGO, ILLINOIS, ASSIGNOR TO JOSEPH T. RY'ERSON &SON, OF CH'IGAGO, ILLINOIS, A CORPORATION OF ILLINOIS. I

romaine-MACHINE.

Specification of Letters Patent.

Patented na 6,1912.

To all whom itmay concern."

Be it known that I, HANS B. KnAU'r, a citizen of the United States, anda resident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Punching-Machines; and Ido hereby declare that the following is a full, clear, and exactdescription thereof, reference being bad tothe accompanying drawings,and to the characters of reference marked thereon, which form a part ofthis specification.

This invention relates to improvements in punching machines and refersto the mechanism for operating the punch, to novel features ofconstruction in the punch bolster and the gage to adapt the machines tooperate on different rolled shapes, and also to other improvements inmachines, as w1ll hereinafter more fully appear.

Certain features of the invention are particularly adaptable to a handunchlng machine, while others are adapta le as well to power machines.

Among the objects of the invention is to provide an improved handactuated mechanism for the punch, arranged to adapt the machine tooperate upon materials of varying thicknesses.

A further object of the invention is to provide improvements in theoperating shaft for the punch slide and the means for mounting the samein the frame, arranged to permit the parts to be readily dismounted fromthe machine for the purpose of replacement or repair.

A further object of the invention is to provide an improved reversiblebolster, arranged to adapt the machine to operate on the various partsof the flanges or webs of rolled shapes, and to provide a reversiblegage to cotiperate with the reversible bolster, and to provide anadjustment of the punch mounting to correspond with the adjustments ofthe bolster.

A further object of the invention is to provide a novel form of stripperadapted to machines of this and other types.

Other ,objects of the invention are to improve and simplify the detailsof the machine, and the invention consists in the matters hereinafterset forth and more particularly pointed out in the appended claims.

In the drawings,-Figure 1 is a front clevation of a hand punchingmachine embodying my invention. Fig. 2 is a partial transverse verticalsection and elevation, the section being taken on line 2-2 of Fig. 3.Fig. 3 is a side elevation of the machine.

Figs. 4, 5, 6 and 7 are sections on the lines 44, 5-5, 66 and 7-7,respectively, of Fig. 3. Fig. 8 is a partial sectional view and partialelevation, the section being taken on line 8-8 of Fig. 4.

The frame of the machine comprises, in general terms, the outer plates10, 10 and 10 and inter osed filler plates 11, 11, three of the lattereing shown, all of which extend from the to to the base of the machine,and are rigidly fixed together by the rivets 12, 12 and pins 13, 13.Said pins are applied in the manner described in my prior applicationfor United States Letters Patent, Serial Number 578,388, filed August22d, 1910. At the base of the machine are riveted two angle bars '14, 14to constitute a suitably wide frame supporting base. The said plates arecut away at the front of the machlnc to provide the forwardly o eningthroat 16, and below said throat a WOlSftil 17 is supported on theframe. The bolster is of novel construction, as hereinafter described.The lower part of the frame below the throat is made somewhat shorterthan the upper part thereof above the throat, thereby giving to theupper part of the frame an overhanging effect. The filler plates 11terminate short of the front margins of the side plates 10 and 10 abovethe throat to provide a chamber between the latter plates at the frontof the machine to receive the punch carrying and operating mechanism.Said upper, overhanging part of the frame carries the punch 18 and itscarrying and operating mechanism, and said punch cooperates with the dieholders 19, 20 on the bolster 17. The punch is operated by a handactuated mechanism which embraces features of novelty and is made asfollows 22 designates ashort, rotative horizontal shaft that is mountedin bearing bushings 23, 23 fixed in the side plates 10, 10 of themachine, and extends across the chamber be tween said plates. The plate10 is a removable part of the frame plate at the lefthand side ofthe-machine for a purpose hereinafter described. The said shaft 22 isprovided with an eccentric 25, which is herein shown as, and preferablyis, made an integral part of the shaft. Said eccentric engages a bearingopening in a pitman 26, shown best in Fig. 8, that is mounted within asuitably shaped opening 27 in a vertically reciprocating punch carryingslide 28 arranged in the chambered portion of the frame and havingguiding engagement at screws 30, Figs. 3 and 8. The removable mountingof the plate 10 permits the eccentric to be made integral with the shaftand at the same time permits said shaft to be readily dismounted fromthe machine when said plate 10 is removed or detached. Such detachmentof the plate 10 is effected by withdrawing the screws and 30. The lowerheaded end of the pitman 26 engages a hard metal bearing block 31 fittedin the punch slide, the head being interfitted with the slide andbearing block to positively raise-the slide.

Keyed or otherwise secured to the shaft 22 just outside the plate 10 isa disk 33 which is provided throughout a port-ion of its periphery witha series of ratchet teeth 34, and at another part of its periphery witha pair of notches 35. Rotatively mounted on said shaft just outside theratchet wheel is a swinging lever 36, the hub 37 of which is formed witha mutilated gear 38 which meshes with a forwardly facing curved rack 40formed on the forward end of a swinging arm 41 at the right hand sideofthe machine that is pivoted to a stud 42 which extends through themachine frame and is held therein by the nut 43. A spacing sleeve 44 isinterposed between the lever and the adjacent frame plate of themachine. Said shaft 22 is held in place in the machine by means of nuts45, 45 screwthreaded to the reduced ends thereof and bearing-against thewashers 46, 46 which are interposed between saidnuts and shoulders onthe shaft.

The hand lever 36 is provided with a suitable extension 48 and is freetoswing or rotate on the shaft 22. Pivoted to said hand 'levleriis apawl 49 which is provided with a tooth 50 adapted to engage the notches35,

35 .of the disk 33. VVhensaid dogis thus engaged with the notched diskand the hand lever is swung forwardly, power is trans- The machine isoperated with this adjustment for continuous punching, or when thematerial being operated upon is sufficiently thin to permit the punch tobe forced through the material with a continuous operation of the punchoperating mechanism with the direct power afforded by the directconnection of the hand lever to said disk. The pawl 49 is held engagedwith the notches 35 by means of a leaf spring 51 fixed to the lever 36,which engages a flat face 52 of the hub of the pawl, as'indicated indotted lines in Fig. 3. Thesaid hub of the pawl is provided with asecond fiat face 52 adapted to be engaged by the leaf spring when thepawl is thrown upwardly out of engagement with the notched disk to holdsaid pawl in its released position;

When operating upon thicker material through which the punch cannot beforced by'the directly applied power, as described, I employ the lever41 with the attachments described, to provide a compound lever action toexert greater force on the punch slide or carrier to force the punch toits work. For this purpose I may employ a push pawl 54 which is pivotedat 55 to the lever 41, near the fulcrum of the latter, said pawl beingprovided with a tooth to engage the ratchet teeth 34 of the disk 33.VVhenthe lever 41 is employed to transmit punching power to the punchslide, the pawl 49 is released from the disk, or thrown upwardly, andthe pawl 54 is engaged with the ratchet teeths34 of said disk. Uponswinging the hand lever forwardly, with this adjustment, the lever 41 isswung upwardly, by-

reason of its meshing engagement with the hub 37 of the hand lever, andacts, through the pawl 54, to turn the disk and the operating' shaft ata reduced speed, as compared to the direct operation described, andtopress the punch to its work with greater power. The said disk is heldfrom turning backwardly by means of a dog 58 which is fixed to a rockshaft 59 that extends through the machine frame, below the eccentricshaft 22, and is provided on the side of the frame, opposite said dog,with a lever arm 60. The said dog 58 is normally held engaged with theratchet teeth of the disk by means of a leaf spring 61 fixed to themachine frame and bearing against a fiat face of the hub of the dog.Said spring also serves, when the dog is thrown backwardly away from thedisk, through the action of the lever arm 60,.

plication of again] thrown ackwardly to swing the sup- Similarly,when-operating with the direct a the eccentric shaft and the punch slidein the position in which they have been depressed. It is obvious thatthe arrangement shown produces a compounded leverage for depressing thepunch which acts much more powerfully than the direct lever connectiondescribed to force the punch through the work. If the material beingoperated upon is so thick as to necessitate the impressment ofadditional power to force it through the work, or to require two or morestages of apower, the hand lever 36 is plemental lever 41 downwardly,and thereby carry the page-1'54 downwardly into engag'ement with flowertooth of theratchet disk, and upon again swinging the lever forwardlythe parts will act 1n the manner before described to depress the tool afarther distance. Such successive impressments of power upon the tool toforce it through the work may be repeated as often as is necessary tocomplete the punching operation.

leverage afforded through the pawl 4-9 and disk 33, the punch may beforced through the work by two stages of impressment of power, the dog58 holding the parts to the position to which they have been forced.

When the pawl 49 is engaged with the notched disk, as indicated indotted lines in Fig. 3, to act directly on the disk to transmit thepunching pressure to the slide, the pawl 54 and dog 58 may be swungbackwardly to the dotted line position indicated in Fig. 3 to preventthem from rattlin against the ratchet teeth of the disk, unless the doghe required to prevent retraction of the disk. Also when the parts areadjusted for the compound lever effect, the pawl 49 will be lifted outof engagement from the notches35 of the disk, as shown in full lines inFi 3.

' ing side flanges .66, 66, (Figs. 1, 2 and 7) Referring now to theconstruction of the reversible bolster 17 and to the manner ofsupporting the same on the frame whereby it may be reversed end to endthereon, the same is made as follows :Said bolster embraces an upwardlyfacing horizontal plate or member 65, and two downwardly extendthe uppermember resting on the frame plates below the throat and the flangesfitting outside of and overlapping the side frame plates 10. The uppermember of the bol'ster is provided at one end with the comparatively lowor shallow die holder 19 and is provided at its other end with therelatively higher die holder 20. The bolster is attached to the frame bythe screw bolts 68 which extend'loosely through horizontally elongatedopenings in the flanges 66 and into screw-threaded openings in the frame(Fig. 6), and set screws 69 which are screwthreaded in openings in saidflanges and bear at their inner ends against the side. plates 10 of theframe. The said flanges 66 are spaced a distance apart slightly greaterthan'the distance between the outer faces of the frame plates 10, sothat, by proper nm- 70 nipulation of the screw bolt: 68 and setoperative die holder thereof laterally into line with the punch.Further, by reason of the elongated openings in the flanges 66 throughwhich the screw bolts 68 extend, said bolster, when the set screws 69are released or turned backwardly, may be shifted longitudinally of theframe to properly adjust 'the operative die holder to the punch.

By reason of the detachable connection of the bolster with the frame,said bolster may be reversed end to end to present either of the dieholders to the punch. The bolster will be adjusted to present the lowerdie holder 19 to the punch when punching thin plates or the flanges ofI, T or angle beams or bars. When punching the webs of T- bars, channelbars and like rolled shapes, the bolster will be reversed end to endfrom the position shown in Fig. 3 to present the higher die holder tothe punch, said higher die holder providing spacelielow the same for theflanges of such rolled shapes when punching the webs thereof. Themachine, when provided with such a reversible bolster, will alsodesirably be provided with a reversible gage, indicated as a whole by72, which is adapted to be reversed or mounted 100 tocorrespond to thereversed positions of the said bolster. The gage 72 is of generalU-form, it comprising the horizontal side members 73, 73 and a closedend member 74, on which latter is formed the gaging face of the gage.Said side members 'fit against the side plates 10 of the machine and areprovided with slots 75 through which attaching or holding screws 76extend to hold the gage in place, and to ermit the same to be ad ustedtoward and rom the punch. The closed end portion of the U-shaped gage ismade considerably narrower than the rear ends of the side bars thereof,so as to bring the gaging face thereof in the plane of the side marginsof said bars at one side of the gage, but to space said gaging face adistance from the opposite side margins of said arms. When, therefore,said gage is adjusted to the position shown in Figs. 1, 2 12d and 3,said closed gaging face lies upon the upper face of the bolster so as toproperly contact with and gage thin sheet material or the flanges ofrolled shapes which are being operated upon. This adjustment is effectedwhen operating with the lower die holder 19. By releasing the holdingbolts 76 and reversing the gageupsidedown, the closed, narrow end orgaging face of the gage will be raised adistance above the sented to thecooperatin work, which is raised above thehorizontal part 65 of thebolster may be properly pre end of the gage. The slotted connection 0the gage with the machine enables the gage to be adjusted to-.

ward and from the punch, and when the gage is reversed from the positionshown 1n Fig. 3 with its closed end above the bolster,

said closed narrower end of the gage may verlap the higher die holder togage work that is to be punched close to the edge of the material. Thereversible bolster and reversible gage provide means in the variousadjustments thereof for properly presenting and gaging various rolledshapes to the tool, as will be obvious to one skilled in this art. f

WVhen the bolster is adjusted with its lower or shorter die holderpresented to the punch, said punch may be mounted in a socketedextension 77 having a shank 78 which fits in the socket 7 9 of the toolslide. When said bolster is presented with its higher die holder to thetool, the said socketed extension may be omitted and the shank ofthepunch engaged directly with the tool socket of the slide.

Next referring to the stripper, the same comprises a U-shaped,horizontally arranged member 80 which embraces the forward side of theframe of the machine, above the throat, and downwardly extendingstripper fingers 81, 81 which are attached at their upper ends to therear ends of the U-shaped bar and are bent inwardly at their lower endsto pass into the side members of the gage. The said stripperfingers 81are provided with vertical slots 82 through which extend the screw bolts83 by which the stripper is attached to the frame. Said slots permit thestripper to be adjusted vertically with respect to the punch tocorrespond to the adjustment of the reversible bolster, the

stripper being adjusted to a lower position when the lower die holder ofthe bolster is presented to the punch, and to a higher position when thehigher bolster die holder is presented to the punch.

It is manifest that the structural details of the invention may bevaried from the illustrated embodiment herein shown within the spiritand scope of the invention and that the invention is not limited to thespecific details and combinations illustrated, except as hereinaftermade the subject of specific claims.

I claim as my invention 1. In a hand punching machine, the combinationwith a frame, a tool carriefguidingly mounted therein to carry a tool, apitthe pitman to actuate it and the said carrier, a disk fixed to theeccentric shaft, a'pivoted hand lever having-means to connect it withthe disk to operate the Earrier, and a second a disk fixed to theeccentric shaft provided with a series of ratchet teeth and with anotch, a pivoted hand lever, a pawl on the hand lever adapted toreleasably engage said notch, a second lever pivoted to the frame andgeared to the hand'lever, a pawl pivoted to the second lever for.engagement with said ratchet teeth, and means for holding the ratchetfrom backward rotation.

3. In a hand punching machine, the combination with a frame, a toolcarrier guidingly mounted therein to carry a tool, a pitman connectedwith the carrier, an eccentric shaft mounted in the frame and engagingthe pitman to actuate it and the said carrier, a disk" fixed to theeccentric shaft and provided with a series of ratchet teeth and with anotch, a hand lever swingingly mounted on said shaft, a pawl on the handlever adapted to releasably engage said notch, said hand lever beingprovided at its pivoted end with gear teeth, a second lever pivoted nearone end thereof to the frame and provided at its other end with a rackengaging the teeth of the hand lever, a pawl pivoted to the second levernear the pivot of the latter to engage with the ratchet teeth, and aholding dog pivoted to the frame to engage the ratchet teeth and holdthe disk from backward rotation.

4:. In a hand punching machine, the combination with a' frame, a-toolcarrierguidingly mounted therein to carry a tool, a pitman connectedwith the carrier, an eccentric shaft mounted in the frame and engagingthe pitman'to actuate it and the sald carrier, a disk fixed to theeccentric-shaft and provided with a series of ratchet teeth and with anotch, a hand lever swingingly mounted on said shaft, a pawl on the handlever adapted to releasably engage said notch, said hand lever beingprovided at its pivoted end with gear teeth, a second lever pivoted nearone end thereof to the frame the ratchet teeth and hold the disk frombackward rotation, said dog being fixed to a rock shaft which extendsthrough the machine frame, and a lever arm fixed to the rock shaft toswing the dog out of engagement with the ratchet teeth.

5. A punching machine comprising a frame having a chamber to receive atool carrier guidingly mounted in said chamber, a

m pitman connected with the tool slide and provided with a bearingopening for an eccentric, a shaft extending through said chamber androtati'vely mounted in the frame and provided with an integral eccentricto engage the pitman bearing opening,

one side of the frame WhlCh carries one of the bearings for the shaftbeing detachably nxed in place, whereby upon removal of the detachableframe piece the eccentric shaft may be removed endwise from the frame,and means operatively connected to the shaft for operating the pitmanand carrier.

6. A punching machine comprising a frame composed of side plates wlth anintermediate filler, and having a chamber to receive a tool carrier, oneof the frame lates at the side of the chamber being detac ably fixed inplace, a tool carrier guidingly mounted in said chamber, a pitmanconnected to the carrier and provided with a bearing opening for aneccentric, a shaft extend ing through said chamber and rotativelymounted in the fixed and removable side plates and provided with anintegral eccentric to engage the pitman bearing opening, whereby, upondetachment of the detachable side late, the eccentric shaft may beremoved endwise from the frame, said shaft extending at one end beyondthe frame, and means mounted on the extended end 'of the shaft forrotating the same and actuating the tool carrier.

7. A punching machine comprising a frame composed of side plates with anintermediate filler, and having a chamber to receive a tool carrier, oneof the frame lates at the side of the chamber being detac ab? fixed inplace, a tool carrier guiding y mounted in said chamber, a itman con- 5nected to the carrier and provided with a bearing opening for aneccentric, a shaft extending through said chamber and rotatively mountedin the fixed and removable side plates and provided with an integraleccentric to engage the pitman bearing opening, whereby, upon detachmentof the detachable side plate, the eccentric shaft may be removed endwisefrom theframe,

, said shaft extending at one end beyond the frame, a notched disk fixedto the extended end of the said shaft, and a hand lever pivoted to saidextended end of the shaft and having means for operatively connectingthe same with the notched disk.

8. A punching machine comprising a frame composed of side plates with anintermediate filler, and having a chamber to receive a tool carrier, oneof the frame plates at the side of the chamber being detachably fixed tothe filler, a plate extending between and detachably fixed to theforward margins of said side plates, to constitute one wall of saidchamber, a tool carrier guidingly mounted in said chamber, a pitmanconnected to the carrier and provided with a bearing opening for aneccentric, a shaft extending through said chamber and rotatively mountedin the fixed and detachable side plates and provided with an integraleccentric to engage the itman bearing opening, said shaft extending atone end beyond the frame, and means mounted on sald extended end oftheshaft forrotating the same and actuating the tool carrier.

9. A hand punching machine comprising a frame composed of side platesand an intermediate filler, the latter terminating short of the frontmargins of the side plates to constitute a chamber to receive the toolcarrier, one of the side plates at the chamber being detachably fixed t0the filler, a plate extending across and detachably fixed to the frontmargins of the side plates to constitute the front wall of the carrierchamber, a tool carrier guidingly mounted in said chamber and providedwith an opening to receive a pitman, a pitman in said opening andconnected with the carrier and havin a bearing opening for an eccentric,a sha t rotatively mounted in the fixed and detachable side plates andprovided with an integral eccentric to engage the bearing opening ofsaid pitman, said shaft extending at one end beyond the frame, and meansmounted on the extended end of the shaft for actuating said shaft andthe tool carrier.

10. In a punching machine, the combination with a frame provided with athroat and with means above the throat for supporting and operating apunch, of a bolster supported on the frame below the throat and providedat its opposite ends with upwardly exposed tool dies of differentheights, and means for attaching the bolster to the frame, arranged topermit the bolster 5 to be reversed end to end to present either of saidtool dies to the punch.

11. In a punching machine, the combination with a frame provided with athroat and with means above the throat for sup- 120 porting andoperating a punch, of a bolster supported on the frame below the throatand provided at its 0 posite ends with upwardly exposed too dies ofdifferent heights, means for attaching the bolster to the frame,arranged to permit the bolster to be reversed end to end to presenteither of said tool dies to the punch, and means associated with thebolster fastening means constructed to permit lateral and longitudinaladjustment of the bolster on the frame, relatively to the punch.

12. In a punching machine, the combination with a frame provided with athroat. and with means above the throat for sup supported on the framebelow the throat and side flanges which lie at the sides of the frame,said horizontal bed being provided at its opposite ends with upwardlyexposed tool dies, and means piercing the side flanges of the bolsterfor attaching the bolster to-the frame, and arranged to permit' thebolster to be reversed end to end to present either of said tool dies tothe punch.

13. In a punching machine, the combination with a frame provided with athroat and with means above the throat for supporting and operating apunch, of a bolster comprising a horizontal bed adapted to be supportedon the frame below the throat and side flanges which lie at the sides ofthe frame, said horizontal bed being provided at its opposite ends withupwardly exposed tool dies, said side flanges of "the bolster being.provided with horizontally elongated openings, attaching bolts extendingthrough said openings and into the' frame, and set screws extendingthrough screw-threaded openings in said sideflanges and bearing againstsaid frame, said flanges being spaced a distance apart slightly greaterthan the width of the frame.

14. In a punching machine, the combina-' tion with a frame, of a bolsterprovided with means for detachably fixing it to the machine frame andconstructed to be reversed thereon end to end, and provided at itsopposite ends with upwardly exposed tool dies of different heights.

15. In a punching machine, a bolster comprising a horizontal bed and twodepending side flanges pierced to receive attaching means to fasten thebolster to the machine, the bolster bed being provided with upwardlyexposed tool dies of different heights.

16. In a punching machine, the combination with. a frame having a throatand provided with meansabove the throat for supporting and operating apunch,' of a bolster attached on the frame below the throat by meanspermitting endwise reversal of the bolster, and provided at its oppositeends with die holders of different heights, where by upon reversal ofthe bolster either die holder may be presented to the punch, and

a, gage having means for vertically adjusting the gaging face thereof tocorrespond to either adjustment of the bolster.

17 In a punching machine, the combination with a frame having a throatand provided with means above the throat for supporting and operating apunch, of a bolster attached on the frame below the throat by meanspermitting endwise reversal ofthe bolster, and provided at its oppositeends with die holders of difierent heights, whereby upon reversal of thebolster either die holder'may be presented to the punch, and a gagehaving a narrow gaging face disposed at the plane of the margin of thegage at one side, and means for attaching the gage to the frame,arranged to permit it to be reversed upside down, whereby the gagingface may be adjusted adjacent to the bolster bed to cooperate with thelower die holder, and may be raised from the bolster bed to cooperatewith the higher die holder. 18. In a punching machine, the combinationwith a frame having a throat and provided with means above thethroat for supporting and operating a punch, of. a bolster attached onthe frame below the. throat by means permitting endwise reversal of thebolster, and provided at its opposite ends with die holders of differenthelghts, whereby upon reversal of the bolster either die holder may bepresented to the punch, a gage having a narrow gaging face disposed atthe plane of the margin of the gage at one side and means for attachinto vthe frame, arranged to permit it to be reversed upside down, wherebythe gaging face may be adjusted adjacent to thebolster bed to cooperatewith the lower die holder, and may be raised from the bolster bed tocooperate with the higher die holder, and means for adjusting said gageon the frame toward and om thepunch.

, 19'. In a punching machine, the combination with aframe having athroat and provided with means abovathe throat for supportingandoperating a punch, of a bolster attached on the frame below the throatby the gage means permitting endwise reversal of the bolster, andprovided at its opposite ends with die holders of different heights,whereby upon reversal of the bolster either die holder may be presentedto the punch, a U-shaped gage, the arms of which lie at the sides of theframe, the .closed portion of which is presented toward the punch, the

said closed portion of the gage being reducedin depth to bring thegaging face thereof in the plane of the margins of the arms at one sideof the gage, and to space thegaging face from the opposite margins ofsaid arms,-

and means for attaching the gage to the frame, permitting said gage tobe reversed upsidedown.

20. In a hand punching machine, the com bination with a frame providedwith n throat and a tool carrier mounted in the frame above the throat,of a bolster sup ported on the frame below the throat by meanspermitting it to be reversed end to end and provided at its oppositeends. with upwardly exposed tool dies of difl erent heights adapted, byreversal 0f the bolster, to be separately presented to the punch, and asocketed punch extension removabl fitted in the carrler andyremovablyreceiving the tool, whereby said tool may be supported from the carrierthrough the medium of said extension, when cooperating with the lowerdie holder, and may be supported from the, carrier directl whencooperating with the' higher die ho der.

21. In a punching machine, a stripper comcomprising a U-shaped bar, theclosed portion of whlch embraces the front of the machine and the armsof which lie at'the sides of the machine, and stripper fingers attachedto and depending from-the side arms.

22. In a punching machine, a stripper comprising a U-shaped bar, theclosed portion of which embraces the front of the machine and the armsof which lie at "the sides of the machine, and stripper fingers attachedto and depending from the, side arms, said stripper fingers beingprovided with vertically elongated slots, and means extending throughthe slots for attaching the stripper to'the frame, arranged to permitvertical adjustment of the strippen.

In testimony, that I claim the foregoing as my invention I aflix mysignature in the resence of two witnesses, this 21st day of ecember A.1910. v

HANS B. KRAUT.

Witnesses: I

W. L. HALL, WILLIAM Gownnnonn.

